Sorry it's been so long since I've replied to anything here. I haven't really done any other work on my N9 since - I started this thread mainly to share the info before I had to quit using the N9 daily, due to the 2G/3G sunset here in the USA. Also a lot of major life changes moved my focus.

Qt4 builds to many different binary packages (libqt4-network being one of them), but there's only one source package. I think it's qt4-x11.

Grob is closed source - there is no source package. If I had access to the grob source, I'd have fixed some bugs and also rebuilt it against a newer WebKit. The worst part is that the particular WebKit lib that grob uses is not in the source distribution (it's a different lib than libqt4-webkit).

I believe I used the ISO that nieldk linked to for source packages.